{"id":23272,"date":"2026-09-30T14:52:47","date_gmt":"2026-09-30T14:52:47","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=23272"},"modified":"2026-09-30T14:52:47","modified_gmt":"2026-09-30T14:52:47","slug":"ephemerides-le-ciel-du-mois-doctobre-2026","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2026\/09\/30\/ephemerides-le-ciel-du-mois-doctobre-2026\/","title":{"rendered":"\u00c9ph\u00e9m\u00e9rides : le ciel du mois d&#8217;octobre 2026"},"content":{"rendered":"<p><strong>Ce mois d&#8217;octobre 2026, Saturne est au plus pr\u00e8s de la Terre. L&#8217;occasion r\u00eav\u00e9e pour admirer la plan\u00e8te aux anneaux avec un t\u00e9lescope.\u00a0 \u00a0<\/strong><\/p>\n<h5>Des anneaux qui s&#8217;ouvrent :<\/h5>\n<p>Le 4 octobre 2026, c&#8217;est l&#8217;opposition de <a href=\"https:\/\/cnes.fr\/dossiers\/planete-saturne\" target=\"_blank\" rel=\"noopener\">Saturne<\/a>. La plan\u00e8te est alors \u00e0 l&#8217;oppos\u00e9 du <a href=\"https:\/\/cnes.fr\/dossiers\/soleil\" target=\"_blank\" rel=\"noopener\">Soleil<\/a>, se levant quand notre \u00e9toile se couche. C&#8217;est donc la meilleure p\u00e9riode pour l&#8217;observer. Elle est en effet au plus pr\u00e8s de la Terre, \u00e0 1,26 milliard de kilom\u00e8tres. Sa <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/05\/06\/quest-lechelle-magnitudes-astronomie\/\" target=\"_blank\" rel=\"noopener\">magnitude<\/a> est de 0,3 et son diam\u00e8tre apparent de 19,7 secondes d&#8217;arc.<\/p>\n<figure id=\"attachment_20084\" aria-describedby=\"caption-attachment-20084\" style=\"width: 450px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/09\/saturne2.jpg\" rel=\"lightbox[23272]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-20084\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/09\/saturne2-450x293.jpg\" alt=\"\" width=\"450\" height=\"293\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/09\/saturne2-450x293.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/09\/saturne2-1024x668.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/09\/saturne2-768x501.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/09\/saturne2.jpg 1500w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><figcaption id=\"caption-attachment-20084\" class=\"wp-caption-text\">Ce superbe clich\u00e9 a \u00e9t\u00e9 r\u00e9alis\u00e9 durant l\u2019opposition 2024. Outre les c\u00e9l\u00e8bres anneaux et les bandes gazeuses qui ceinturent le disque de la plan\u00e8te, on distingue \u00e9galement deux de ses nombreux satellites.\u00a0 \u00a9 <a href=\"https:\/\/www.astrobin.com\/users\/Simon74\/\" target=\"_blank\" rel=\"noopener\">Simon Laberg\u00e8re<\/a>\u00a0et\u00a0<a href=\"https:\/\/www.instagram.com\/theoginspector\/\" target=\"_blank\" rel=\"noopener\">Robin Le Guern<\/a><\/figcaption><\/figure>\n<p>En raison de l\u2019inclinaison du plan \u00e9quatorial de la plan\u00e8te, l\u2019aspect de ses anneaux change au cours d\u2019une r\u00e9volution (en un peu moins de 30 ans). Lors des solstices saturniens (comme en octobre 2017), nous les voyons avec un angle maximal de 26\u00b0 44\u2032. Au moment des \u00e9quinoxes saturniens (le dernier s\u2019est produit en 2025), ils sont visibles par la tranche. Depuis, ils s\u2019ouvrent progressivement (lire <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2026\/06\/29\/premieres-images-de-louverture-des-anneaux-de-saturne\/\" target=\"_blank\" rel=\"noopener\">ici<\/a>) et atteindront un angle de 27\u00b0 en 2032.<!--more--><\/p>\n<h5>Le ciel en octobre 2026 :<\/h5>\n<ul>\n<li>Le 3, c&#8217;est le Dernier quartier de Lune.<\/li>\n<li>Le 4, c&#8217;est l&#8217;opposition de Saturne (lire plus haut).<\/li>\n<li>Le 5 avant l&#8217;aube, le vieux croissant de Lune accompagne la plan\u00e8te <a href=\"https:\/\/cnes.fr\/dossiers\/planete-mars\" target=\"_blank\" rel=\"noopener\">Mars<\/a>. En descendant vers l&#8217;horizon Est, vous rencontrerez successivement l&#8217;<a href=\"https:\/\/www.stelvision.com\/astro\/fiche-observation\/creche-ou-ruche-amas-m44-aux-jumelles\/\" target=\"_blank\" rel=\"noopener\">amas de la Cr\u00e8che<\/a> et <a href=\"https:\/\/cnes.fr\/dossiers\/planete-jupiter\" target=\"_blank\" rel=\"noopener\">Jupiter<\/a>, qui jouxte le croissant 24 heures plus tard.<\/li>\n<\/ul>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/09\/eph1.jpg\" rel=\"lightbox[23272]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-23274\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/09\/eph1-450x246.jpg\" alt=\"\" width=\"450\" height=\"246\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/09\/eph1-450x246.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/09\/eph1-1024x559.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/09\/eph1-768x419.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/09\/eph1.jpg 1062w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<ul>\n<li>Le 7 avant l&#8217;aube, le fin croissant accompagn\u00e9 de sa <a href=\"https:\/\/www.stelvision.com\/astro\/quest-ce-que-la-lumiere-cendree-de-la-lune\/\" target=\"_blank\" rel=\"noopener\">lumi\u00e8re cendr\u00e9e<\/a> fr\u00f4le <a href=\"https:\/\/fr.wikipedia.org\/wiki\/R%C3%A9gulus_(%C3%A9toile)\" target=\"_blank\" rel=\"noopener\">R\u00e9gulus<\/a>, la plus brillante \u00e9toile du <a href=\"https:\/\/fr.wikipedia.org\/wiki\/Lion_(constellation)\" target=\"_blank\" rel=\"noopener\">Lion<\/a>. Un spectacle \u00e0 ne pas manquer dans une paire de jumelles.<\/li>\n<\/ul>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/09\/eph3.jpg\" rel=\"lightbox[23272]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-23277\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/09\/eph3-450x246.jpg\" alt=\"\" width=\"450\" height=\"246\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/09\/eph3-450x246.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/09\/eph3-1024x559.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/09\/eph3-768x419.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/09\/eph3.jpg 1062w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<ul>\n<li>Le 10, c&#8217;est la Nouvelle Lune.<\/li>\n<li>Le 13, c&#8217;est l&#8217;opposition de l&#8217;ast\u00e9ro\u00efde <a href=\"https:\/\/fr.wikipedia.org\/wiki\/(4)_Vesta\" target=\"_blank\" rel=\"noopener\">Vesta<\/a>. Il se trouve dans la constellation de la <a href=\"https:\/\/fr.wikipedia.org\/wiki\/Baleine_(constellation)\" target=\"_blank\" rel=\"noopener\">Baleine<\/a>, avec une magnitude de 6,5. Une paire de jumelles est donc suffisante pour le rep\u00e9rer, mais une carte est indispensable pour le distinguer au milieu des \u00e9toiles.<\/li>\n<\/ul>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/09\/eph2.jpg\" rel=\"lightbox[23272]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-23275\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/09\/eph2-450x248.jpg\" alt=\"\" width=\"450\" height=\"248\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/09\/eph2-450x248.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/09\/eph2-1024x565.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/09\/eph2-768x424.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/09\/eph2-672x372.jpg 672w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/09\/eph2.jpg 1062w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<ul>\n<li>Le 18, c&#8217;est le <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2018\/03\/25\/voit-on-lors-dun-premier-quartier-de-lune\/\" target=\"_blank\" rel=\"noopener\">Premier quartier de Lune<\/a>.<\/li>\n<li>Le 22, <a href=\"https:\/\/cnes.fr\/dossiers\/planete-neptune\" target=\"_blank\" rel=\"noopener\">Neptune<\/a> (magnitude 7,8) est rep\u00e9rable entre Saturne et une grosse Lune gibbeuse.<\/li>\n<\/ul>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/09\/eph4.jpg\" rel=\"lightbox[23272]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-23278\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/09\/eph4-450x247.jpg\" alt=\"\" width=\"450\" height=\"247\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/09\/eph4-450x247.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/09\/eph4-1024x562.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/09\/eph4-768x422.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/09\/eph4.jpg 1067w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<ul>\n<li>Le 26, c&#8217;est la Pleine Lune.<\/li>\n<\/ul>\n<p><em>Les captures d\u2019\u00e9cran qui illustrent ces \u00e9ph\u00e9m\u00e9rides ont \u00e9t\u00e9 r\u00e9alis\u00e9es \u00e0 l\u2019aide du logiciel\u00a0<a href=\"https:\/\/stellarium.org\/fr\/\" target=\"_blank\" rel=\"noopener\">Stellarium<\/a>, indispensable pour vos soir\u00e9es d\u2019astronomie.<\/em><\/p>\n<h5>Vous pourriez aimer :<\/h5>\n<ul>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2026\/08\/21\/acuter-elite-phoenix-une-etonnante-lunette-solaire\/\" target=\"_blank\" rel=\"noopener\">Acuter Elite Phoenix, une \u00e9tonnante lunette solaire<\/a><\/li>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2025\/12\/28\/2025-une-annee-riche-en-astrodessins\/\" target=\"_blank\" rel=\"noopener\">2025, une ann\u00e9e riche en astrodessins<\/a><\/li>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2026\/06\/29\/premieres-images-de-louverture-des-anneaux-de-saturne\/\" target=\"_blank\" rel=\"noopener\">Premi\u00e8res images de l\u2019ouverture des anneaux de Saturne<\/a><\/li>\n<\/ul>\n<p>Suivez l\u2019actualit\u00e9 astronomique et d\u00e9couvrez mes images du ciel en vous abonnant \u00e0 Cielmania sur\u00a0<a href=\"https:\/\/www.facebook.com\/cielmania\/\" target=\"_blank\" rel=\"noopener noreferrer\">Facebook<\/a>.<\/p>\n<!-- AddThis Advanced Settings generic via filter on the_content --><!-- AddThis Share Buttons generic via filter on the_content -->","protected":false},"excerpt":{"rendered":"<p>Ce mois d&#8217;octobre 2026, Saturne est au plus pr\u00e8s de la Terre. L&#8217;occasion r\u00eav\u00e9e pour admirer la plan\u00e8te aux anneaux avec un t\u00e9lescope.\u00a0 \u00a0 Des anneaux qui s&#8217;ouvrent : Le 4 octobre 2026, c&#8217;est l&#8217;opposition de Saturne. La plan\u00e8te est alors \u00e0 l&#8217;oppos\u00e9 du Soleil, se levant quand notre \u00e9toile se couche. C&#8217;est donc la &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2026\/09\/30\/ephemerides-le-ciel-du-mois-doctobre-2026\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">\u00c9ph\u00e9m\u00e9rides : le ciel du mois d&#8217;octobre 2026<\/span>  <span class=\"meta-nav\">&rarr;<\/span><\/a><!-- AddThis Advanced Settings generic via filter on get_the_excerpt --><!-- AddThis Share Buttons generic via filter on get_the_excerpt --><\/p>\n","protected":false},"author":8,"featured_media":23273,"comment_status":"open","ping_status":"open","sticky":true,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[509],"tags":[149,4024,136],"class_list":["post-23272","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites","tag-ephemerides","tag-octobre-2026","tag-saturne"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u00c9ph\u00e9m\u00e9rides : le ciel du mois d&#039;octobre 2026<\/title>\n<meta name=\"description\" content=\"Ce mois d&#039;octobre 2026, Saturne est au plus pr\u00e8s de la Terre. 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